Mine always closes by sending me some sort of hug depending on what's going on for me. For example recently, "a safe journey hug" and "a kind and loving hug." She never signs her name and there is no info with her phone number, etc.. She does have a huge confidentiality clause at the end. It used to bother me for the formality, but the rest of her email is less formal and I'm used to it now. She probably even forgets that it's there as it's automatic when she sends any email.